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• W2980333488 abstract "Several problems in imaging acquire multiple measurement vectors (MMVs) of Fourier samples for the same underlying scene. Image recovery techniques from MMVs aim to exploit the joint sparsity across the measurements in the sparse domain. This is typically accomplished by extending the use of $ell_1$ regularization of the sparse domain in the single measurement vector (SMV) case to using $ell_{2,1}$ regularization so that the jointness can be accounted for. Although effective, the approach is inherently coupled and therefore computationally inefficient. The method also does not consider current approaches in the SMV case that use spatially varying weighted $ell_1$ regularization term. The recently introduced variance based joint sparsity (VBJS) recovery method uses the variance across the measurements in the sparse domain to produce a weighted MMV method that is more accurate and more efficient than the standard $ell_{2,1}$ approach. The efficiency is due to the decoupling of the measurement vectors, with the increased accuracy resulting from the spatially varying weight. This paper introduces the accelerated VBJS which reduces computational cost even further by eliminating the requirement to first approximate the underlying image in order to construct the weights. Eliminating this preprocessing step moreover reduces the amount of information lost from the data, so that our method is more accurate. Numerical examples provided in the paper verify these benefits." @default.
• W2980333488 created "2019-10-25" @default.
• W2980333488 creator A5052474931 @default.
• W2980333488 creator A5059628457 @default.
• W2980333488 date "2019-10-18" @default.
• W2980333488 modified "2023-09-27" @default.
• W2980333488 title "Accelerated Variance Based Joint Sparsity Recovery of Images from Fourier Data." @default.
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• W2980333488 hasPublicationYear "2019" @default.
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